Yaf_Dispatcher::catchException

Description

While the application.dispatcher.throwException is On(you can also calling
to Yaf_Dispatcher::throwException(TRUE)() to enable it), Yaf will throw Exception whe
error occurrs instead of trigger error.

then if you enable Yaf_Dispatcher::catchException()(also can enabled by set
application.dispatcher.catchException),
all uncaught Exceptions will be caught by ErrorController::error if you have defined one.